issues/1649-noResultsView-refresh-flicker

only remove noResultsView from superview when there are results to show, Fixes #1649
issues/2176-settings-about-size

set webView width via meta tag in webViewDidFinishLoad for instances when we are showing a webView in a popover
Avatars in notifications are now circular.

Added wrapper view around noticon in notifications list to simulate a border. (setting cornerRadius and border on the layer were causing some artifacting)
Restoring `noticonRadius` property.
Added circular gravatars to the Reader and comments
Increased the size of the notion by a few pixels.

Design states that noticon should be 16px.
Merge branch 'develop' into issue/2654-circular-avatars
Added `CircularImageView` subclass to fix some DRY.
Merge branch 'develop' into issue/2654-circular-avatars
Set the frame on the imageView in `CommentContentView`.

Allows the circular rounding to work properly.
Merge branch 'develop' into issue/2654-circular-avatars
Corrected WPContentAttribution view to use CircularImageView.

Code style cleanup, hat tip @aerych.
CircularImageView now used in ReaderPostHeaderView
Updates CocoaLumberjack dependency
Updates Notifications Separator Color
Merge pull request #2679 from garza/issues/2176-settings-about-size

issues/2176-settings-about-size
Merge pull request #2773 from wordpress-mobile/issue/2591-updates-notification-colors

Updates Notifications Separator Color
Mapping to WPStyleGuide getter
Merge pull request #2648 from garza/issues/1649-noResultsView-refresh-flicker

issues/1649-noResultsView-refresh-flicker
Merge pull request #2776 from wordpress-mobile/issue/2591-updates-notification-colors

Mapping to WPStyleGuide getter